JP2002012167A - Reinforcing structure of hollow structure and reinforcing tool therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing structure of a hollow structure and a reinforcing tool therefor capable of efficiently reinforcing the hollow structure. SOLUTION: A reinforcing body 11 extending in the lengthwise direction with the required length is installed in a hollow chamber 6 of the hollow structure 1, and a foaming body 35 is interposed between an inner wall surface of the hollow chamber 6 and the reinforcing body 11. The foaming body 35 continuously exists over the almost total length in the lengthwise direction of the reinforcing body 11, and integrally joins the hollow structure 1 and the reinforcing body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for a hollow structure and a reinforcing tool therefor, and more particularly to a hollow panel (for example, a center pillar of a vehicle body, a hollow body having a hollow box-shaped closed cross-section formed by a plurality of panels). Front pillar, quarter pillar, roof side panel, rocker panel, etc.)
The present invention relates to a reinforcing structure of a hollow structure for reinforcing steel and a reinforcing tool therefor.

[0002]

2. Description of the Related Art Conventionally, for example, in order to reinforce a hollow panel of a vehicle body, a reinforcing member extending in a required length in a longitudinal direction is provided in a hollow chamber of the hollow panel. It is known to reinforce hollow panels. Further, a structure in which the inner wall surface of the hollow panel and both ends in the longitudinal direction of the reinforcing member are joined by a foam is also known. As a reinforcing structure of a hollow structure having such a structure, for example, Japanese Patent Application Laid-Open No. H10-53156
Issue.

[0003]

By the way, it is difficult to install a reinforcing member inside a hollow chamber of a hollow panel without a gap, and a gap is generated between the inner wall surface of the hollow panel and the reinforcing member. The reinforcing member is moved relative to the hollow chamber of the hollow panel by an amount corresponding to the gap. That is, when an external force acts on the hollow panel, the hollow panel is deformed by an amount corresponding to the gap and then comes into contact with the reinforcing member. Here, the load of the external force is supported by the reinforcing member for the first time. For this reason, it is not possible to efficiently reinforce the hollow panel simply by providing the reinforcing member inside the hollow chamber of the hollow panel. Also, in a structure in which the inner wall surface of the hollow panel and both ends in the longitudinal direction of the reinforcing member are joined by a foam, the gap is closed by the foam only at the both ends in the longitudinal direction of the reinforcing member. It is. However, a gap still exists between the inner wall surface of the hollow panel and the reinforcing member except for the portion where the foam exists at both ends in the longitudinal direction of the reinforcing member. Then, the hollow panel has a structure that is easily deformed by an amount corresponding to the gap between the inner wall surface of the hollow panel and the reinforcing member, and there is a problem that the reinforcing effect against the torsional load is particularly small.

An object of the present invention is to provide a hollow structure reinforcement structure and a reinforcement for the hollow structure, which can efficiently reinforce the hollow structure in view of the above-mentioned conventional problems.

[0005]

In order to achieve the above object, a hollow structure for a hollow structure according to a first aspect of the present invention has a gist as described in claim 1. Therefore, the foam is present continuously over substantially the entire length of the reinforcing member in the longitudinal direction, and is integrally joined (adhered) to the inner wall surface of the hollow structure. For this reason, when an external force acts on the hollow structure and the hollow structure tries to deform due to the load, the load is transmitted to the reinforcement through the foam, and the load is supported by the reinforcement. This prevents deformation of the hollow structure. Further, since the foam body integrally joins (adheses) the inner wall surface of the hollow structure and the reinforcing body, it is necessary to prevent the deformation of the hollow structure within a range where the reinforcing body exists. Can be. As a result, unlike the related art, it is possible to prevent a problem that the hollow structure is unexpectedly deformed due to a gap between the hollow structure and the reinforcing member.

[0008] A reinforcement structure for a hollow structure according to a second aspect of the invention has a structure as described in claim 2. Therefore, the relative movement of the foam in the longitudinal direction can be prevented by the locking portion of the reinforcement, and the bonded state between the reinforcement and the foam can be maintained, and the torsional strength can be efficiently improved. .

A third aspect of the present invention provides a reinforcing member for a hollow structure, the gist of which is as described in claim 3. Therefore, the hollow structure reinforcing structure of the first aspect can be easily configured by using the hollow structure reinforcing tool.

[0008] A reinforcement for a hollow structure according to a fourth aspect of the present invention has a gist as set forth in claim 3. Therefore, regardless of the long or short (granular) foamable base material, the foamable base material can be securely held in the holding groove extending over substantially the entire length of the side wall portion of the reinforcing member without falling off. It can be easily transported and managed, and has improved assemblability.

A fifth aspect of the present invention provides a reinforcing member for a hollow structure, the gist of which is as set forth in claim 5. Therefore, the engaging portion formed on the groove wall surface (including the bottom surface) of the holding groove of the reinforcing member can prevent the foam body based on the foaming of the foamable base material from relatively moving in the longitudinal direction. . In this manner, the relative movement of the foam in the longitudinal direction of the reinforcing body is prevented, the reinforcing body and the foam can be maintained in a joined state, and the torsional strength can be efficiently improved.

[0010] Further, a reinforcing tool for a hollow structure according to a sixth aspect of the present invention has a gist as described in claim 4. Therefore, since the foamable base material that is continuously continuous over substantially the entire length in the longitudinal direction of the reinforcing member is easily formed by extrusion, the cost reduction is highly effective.

[0011]

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. 2 and 3, a hollow panel (for example, a center pillar) 1
The inner panel 2 and the outer panel 4 are formed in a hollow box-shaped closed cross section by spot welding the flanges 3 and 5 of each other. The inner panel 2 has a required number of mounting holes 7 formed therein. Further, the hollow panel 1 is reinforced by mounting a reinforcing member 10 in the hollow chamber 6.

As shown in FIG. 1, a reinforcing member 10 is provided at a predetermined position on a reinforcing member 11 extending with a required length in the longitudinal direction of the hollow chamber 6 of the hollow panel 1. And a foamable substrate 30. The reinforcing body 11
Is made of a heat-resistant hard synthetic resin material, is provided in a longitudinal direction of the hollow chamber 6, and is provided so as to straddle between the pair of outer wall portions 12 facing each other at a predetermined interval. Further, a plurality of horizontal wall portions 14 arranged at predetermined intervals in the longitudinal direction of the hollow chamber 6 are integrally provided.
Further, the pair of outer wall portions 12 of the reinforcing body 11 face the inner wall surface of the hollow chamber 6 with a predetermined gap. Further, on the outer surfaces of the pair of outer wall portions 12 (surfaces facing the inner wall surfaces of the hollow chambers 6), holding grooves 13 having a substantially U-shaped cross section are continuously formed over the entire length in the longitudinal direction.

In the first embodiment, the outer wall 1 on one side (the side facing the inner panel 2) of the reinforcing member 11 is provided.
2, a required number of mounting clips 20 which are inserted into the mounting holes 7 and elastically engaged with each other are integrally formed. The mounting clip 20 constitutes mounting means for mounting the reinforcing body 11 in the hollow chamber 6 of the hollow panel 1, and as shown in FIG. 3, a pedestal provided on one outer wall 12 of the reinforcing body 11. And a leg 22 protruding from the pedestal 21 toward the mounting hole 7, extending in a folded manner from the tip of the leg 22, and elastically engaging with a hole edge of the mounting hole 7. And a pair of elastic locking pieces 23. Further, in the first embodiment, the reinforcing member 11 and the mounting clip 20 are integrally formed by injection molding of a hard synthetic resin material having heat resistance, thereby reducing the number of parts and the number of assembling steps.

The foam 11 is fixed to the reinforcing member 11 by an adhesive or the like, which is continuously formed along the inside of the holding groove 13 of the pair of outer walls 12. These foamable substrates 3
Numeral 0 is for foaming by external heating to form a foam 35, and to join the inner wall surface of the hollow panel 1 and the reinforcing body 11 integrally. The foamable base material 30 has an adhesive property to a metal surface or a synthetic resin surface, and particularly includes a synthetic resin material having excellent adhesiveness to a metal surface as a main component, and further includes a foaming agent, a glass fiber And the like (for example, 110 ° C. to 1 ° C.)
(A temperature of about 90 ° C.), and is preferably formed of a foamable material that becomes a highly rigid foam by foaming. Examples of such a foaming material which is excellent in metal adhesion and becomes a highly rigid foam include, for example, JP-A-8-208871,
It is disclosed in JP-A-11-158313.
Further, in the first embodiment, an extruded product obtained by extruding a synthetic resin-based foamable material mixed with a foaming agent from a die of an extruder into a long length has a length substantially equal to the entire length dimension of the reinforcing body 11. The foamable base material 30 that is continuous in series is formed by being cut with dimensions.

As described above, the reinforcing member 11 and the foamable base material 3
The reinforcing member 10 provided integrally with the reinforcing member 10 is mounted in the hollow chamber 6 of the hollow panel 1 to reinforce the hollow panel 1 as described below. That is, as shown in FIGS. 2 and 3, when the reinforcing member 10 is attached to the hollow chamber 6 of the hollow panel 1, first, the inner panel 2 and the outer panel 4 that constitute the hollow panel 1 are connected to each other. Before the spot welding is performed on the flanges 3 and 5, the reinforcing member 10 is mounted on the required number of mounting holes 7 of the inner panel 2 by the mounting clips 20 on the reinforcing body 11. Thereafter, the inner panel 2 and the outer panel 4 are connected to each other by the flanges 3, 5 thereof.
Are spot-welded to form a hollow panel 1 having a hollow box-shaped closed cross section.

Here, the foamable base material 30 of the reinforcing member 11 foams into a foam 35 by external heating, for example, external heating during baking of the vehicle body having the hollow panel 1 (see FIG. 1). 4 and 5). And
A foam 35 formed by foaming of the foamable base material 30 is continuously continuous in the longitudinal direction of the hollow chamber 6, and has an inner wall surface (both inner surfaces of the inner panel 2 and the outer panel 4) of the hollow chamber 6 and the reinforcing member 11.
Are bonded to the holding grooves 13 of the pair of outer wall portions 12 without any gap. Thereby, the hollow panel 1 and the reinforcing body 11 are joined, and the hollow panel 1 is reinforced.

As described above, the outer wall 12 of the reinforcing body 11
The foamable base material 30 fixed in the holding groove 13 is foamed to form a foam 35, so that the foam 35 is continuously continuous in the longitudinal direction of the hollow chamber 6 and the inner wall surface of the hollow chamber 6, The reinforcing members 11 are adhered to the pair of outer wall portions 12 without gaps.
For this reason, when an external force acts on the hollow panel 1 and the hollow panel 1 attempts to deform due to the load, the load is transmitted to the reinforcing body 11 via the foam 35 and is supported by the reinforcing body 11. Thereby, the deformation of the hollow panel 1 is prevented. Furthermore, since the foam 35 exists continuously over substantially the entire length of the reinforcing member 11 in the longitudinal direction, the deformation of the hollow panel 1 can be prevented within the length of the reinforcing member 11. For this reason, unlike the related art, it is possible to prevent a problem that the hollow panel 1 is unexpectedly deformed due to a gap between the hollow panel 1 and the reinforcing body 11, and it is possible to efficiently reinforce the hollow panel 1. it can. In particular, the reinforcing effect on the torsional load of the hollow panel 1 is great.

The reinforcing member 11 is made of a hard synthetic resin and a hard synthetic resin mixed with reinforcing fibers, and the foamable base material 30 is made of a synthetic resin having excellent adhesiveness to a metal surface or a synthetic resin surface. As a component, a foaming agent, a fibrous substance such as glass fiber, or the like is mixed with the foamed material to form a highly rigid foam (for example, JP-A-8-208871,
By forming the hollow panel 1 from a foaming material disclosed in Japanese Patent Application Laid-Open No. H11-158313 or the like, the hollow panel 1 can be further reinforced.

In the reinforcing device 10 of the first embodiment, a holding groove 13 is formed over the entire length of the pair of outer wall portions 12 of the reinforcing body 11, and a continuous foaming base material is continuously formed in the holding groove 13. 30 is fixed by an adhesive or the like. For this reason, it is possible to prevent a problem that the foamable base material 30 is unexpectedly dropped from the reinforcing member 11, and it is easy to carry and manage the inventory of the reinforcement 10, and to attach the reinforcement 10 to the hollow panel 1. It will be easier. Further, by cutting an extruded product in which a synthetic resin-based foamable material mixed with a foaming agent is extruded from a die of an extruder with a length substantially equal to the entire length of the reinforcing member 11, The continuous foamable base material 30 can be easily formed, and the manufacturing cost of the reinforcing device 10 can be reduced.
Further, the foamable base material 30 is fixed in the holding groove 13 by pushing the foamable base material 30 into the holding groove 13 of the outer wall portion 12 of the reinforcing body 11 while having the viscosity immediately after the extrusion molding. In this case, it is possible to save the trouble of bonding and fixing the foamable base material 30 with the adhesive.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIGS. In the structure for reinforcing the hollow panel 1 as a hollow structure according to the second embodiment, a locking portion 118 for preventing the longitudinal movement of the foam 135 with respect to the reinforcing body 111 is provided at a predetermined position of the reinforcing body 111. It is formed at the position. That is, the foam 135 obtained by foaming the foamable base material 130 having excellent metal adhesion strongly adheres to the hollow panel 1 with an adhesive force larger than the adhesive force to the reinforcing member 111. In other words, the foam 135 has insufficient adhesion to the reinforcing body 111, and the reinforcing body 111 and the foam 135 may move relatively in the longitudinal direction. , The reinforcing member 111
In contrast, by preventing the foam 135 from relatively moving in the longitudinal direction by the locking portion 118 of the reinforcing body 111, the joined state (adhered state) between the reinforcing body 111 and the foam 135 is maintained. It was made. Further, the reinforcing member 110 for configuring such a reinforcing structure is configured as follows.

First, as shown in FIG. 7, of the reinforcing member 111 constituting the reinforcing member 110 and the foamable base material 130,
The reinforcing member 111 is made of a heat-resistant hard synthetic resin material, and has a substantially M-shaped cross section. That is, the reinforcing body 111 has two inner wall portions 115 whose one end (lower end in FIG. 7) is connected by a substantially arc-shaped bottom 117 in the cross section, and the other ends of these inner wall portions 115 (toward FIG. 7). (Upper end) are integrally provided with both outer wall portions 112 connected by a substantially arc-shaped top portion 116 and extending in a folded shape. Further, between the adjacent outer wall portion 112 and the inner wall portion 115 and between the two inner wall portions 115, the horizontal wall portion 1 is provided.
14 are provided. In addition, holding grooves 113 are provided on the outer surfaces of both outer wall portions 112 of the reinforcing member 111 (in the second embodiment, a total of four places on the upper and lower portions of the outer surface of both outer wall portions 112) over the entire length in the longitudinal direction. Each is recessed in a continuous manner.

Further, as shown in FIG.
Formed on the outer surface of the outer wall portion 112 with a predetermined groove width therebetween, and the opposing protruding pieces 112a are formed.
It is also possible to form the holding groove 113 between them. Further, as shown in FIG.
Protruding piece 112b opposed to the outer surface of the
Are formed, and the holding groove 1 is formed between the opposed protruding pieces 112b.
It is also possible to form 13 in a raised state. In this case, the foamable base material 1 is increased by the height of the holding groove 113.
30 is brought closer to the inner wall surface of the hollow panel 1, or
The thickness of the foamable base material 130 can be reduced.

On the bottom surface of each holding groove 113 of the reinforcing member 111, there is provided a locking portion 118 consisting of a plurality of holes, concave portions, protrusions, uneven portions and the like spaced at a predetermined interval in the longitudinal direction. The retaining portion 118 of the holding groove 13 prevents unexpected movement of the foam 135 in the longitudinal direction of the reinforcing member 111. In the second embodiment, as shown in FIG. 11, a hole-shaped locking portion 118 is provided on the bottom surface of the holding groove 113. Also, as shown in FIG.
By providing c, it is possible to prevent unexpected movement of the foam 135 in the longitudinal direction of the reinforcing member 111.

In the second embodiment, as shown in FIGS. 6 and 7, the bottom 117 of the reinforcing member 111 is provided with mounting means for attaching the reinforcing member 111 to the hollow chamber 6 of the hollow panel 1. A number of mounting clips 120 are integrally formed. The mounting clip 120 is formed in substantially the same manner as in the first embodiment,
11, a pedestal 121 provided on the bottom 117, a leg 122 protruding from the pedestal 121 toward the mounting hole 7 of the hollow panel 1, and a folded portion extending from the tip of the leg 122. And a pair of elastic locking pieces 123 elastically engaged with the edge of the mounting hole 7.

The foamed base material 1 continuously extends along the inside of each holding groove 113 of both outer wall portions 112 of the reinforcing body 111.
30 are provided. These foamable base materials 130 are foamed by external heating to form a foam 135 for joining the inner wall surface of the hollow panel 1 and the reinforcing member 111 integrally, and are substantially the same as in the first embodiment. It is made of a synthetic resin-based foaming material mainly composed of a synthetic resin material having excellent adhesiveness to a metal surface, and is formed in a strip shape by injection molding. In the second embodiment,
On one side surface of the foamable base material 130 facing the bottom surface of the holding groove 113 of the reinforcing member 111, a hole-shaped locking portion 1 of the holding groove 113 is provided.
A projection-like engaging portion 131 that is inserted into and engages with the projection 18 is provided.

Further, by forming the engaging portion 131 of the foamable base material 130 into a structure that can be elastically engaged with the engaging portion 118 of the holding groove 113, for example, a clip structure, the foaming material The base material 130 can be fixed without using an adhesive. Further, it is also possible to press-fit the engaging portion 131 of the foamable base material 130 into the locking portion 118 of the holding groove 113. Further, it is also possible to fix the foamable base material 130 to the holding groove 113 of the reinforcing member 111 using an adhesive. In this case, it is not always necessary to provide the protruding locking portion 118 on the foamable base material 130. Also, as shown in FIG.
In the case where a projection-shaped locking portion 118 is provided on the foaming base material 130, a hole-shaped engaging portion 131 c corresponding to the locking portion 118 is provided on the foamable base material 130.

As described above, the reinforcing member 110 provided integrally with the reinforcing member 111 and the foamable base material 130 is mounted in the hollow chamber 6 of the hollow panel 1 in substantially the same manner as in the first embodiment. That is, as shown in FIG. 7 and FIG.
Before spot welding the inner panel 2 and the outer panel 4 constituting
For the required number of mounting holes 7 of the inner panel 2,
Is attached to the reinforcing member 111 by the attachment clip 20. Thereafter, the inner panel 2 and the outer panel 4 are spot-welded at their mutual flanges 3 and 5 to form the hollow panel 1 having a hollow box-shaped closed cross section. Here, the foamable base material 130 foams due to external heating at the time of baking painting of the vehicle body, and the foam 1
35 (see FIGS. 9 and 10). Then, a foam 135 formed by foaming the foamable base material 130 is continuously formed in the longitudinal direction of the hollow chamber 6 continuously, and the inner wall surface of the hollow chamber 6 and the reinforcing body 1
11 are adhered to the holding grooves 113 of the outer wall 112 without gaps. Thereby, the hollow panel 1 and the reinforcing body 111
And the hollow panel 1 is reinforced.

As described above, the outer wall 1 of the reinforcing member 111
When the foamable base material 130 fixed in the holding groove 113 of FIG. 12 foams to form a foam 135, the foam 135 is continuously continuous in the longitudinal direction of the hollow chamber 6, and contacts the inner wall surface of the hollow chamber 6. Then, they are bonded to both outer wall portions 112 of the reinforcing member 111 without gaps. For this reason, an external force acts on the hollow panel 1,
When the hollow panel 1 tries to be deformed by the load,
The load is transmitted to the reinforcing member 111 via the foam 135 and is supported by the reinforcing member 111, whereby the deformation of the hollow panel 1 is prevented. Furthermore, foam 1
Since 35 exists continuously over substantially the entire length of the reinforcing member 111 in the longitudinal direction, the deformation of the hollow panel 1 can be favorably prevented within the range where the reinforcing member 111 exists. As a result, the hollow panel 1 and the reinforcing member 111
The hollow panel 1 can be prevented from being inadvertently deformed due to the gap therebetween, and the hollow panel 1 can be efficiently reinforced.

In the second embodiment, as shown in FIG. 11, the bottom surface of each holding groove 113 of the reinforcing member 111 has
A plurality of hole-shaped locking portions 118 are provided at predetermined intervals in the longitudinal direction. For this reason, as shown in FIG. 12, the engaging portion 1 of the foamable base material 130 is
In the state in which 31 is engaged, the foamable base material 130 foams, and at the same time as the foam 135, also foams in the engaging portion 131 to become a foam 136, and a part of the foam 136 is
Outer wall portion 1 of reinforcing body 111 penetrating through hole-shaped locking portion 118
12 bulges on the inner surface. Therefore, the reinforcement 1
11 and the foam 135 can be firmly joined, and unexpected movement of the foam 135 in the longitudinal direction of the reinforcing body 111 can be reliably prevented. As a result, the relative movement of the reinforcement body 111 and the hollow panel 1 in the longitudinal direction can be reliably prevented by the foam 135.
As described above, since the foam body 135 is prevented from relatively moving in the longitudinal direction, and the reinforcing body 111 and the foam body 135 can be maintained in a joined state (adhered state), in particular, the torsion of the hollow panel 1 Can be efficiently improved.

As shown in FIGS. 11 to 14, when the locking portion 118 provided in the holding groove 113 of the reinforcing member 111 is formed in a hole shape, a concave shape, or the like, the foamable base material 130 is not necessarily provided. The engaging portion 131 need not be provided. That is, at the same time as the foamable base material 130 foams and becomes the foam 135, a part of the foam 135 is filled in and engaged with the hole-shaped or concave-shaped locking portion 118. For this reason, the reinforcement 1
11 can be reliably prevented from moving unexpectedly in the longitudinal direction of the foam body 135.

The present invention is not limited to the first and second embodiments. For example, the reinforcing member 11 (or 11
One or more holding grooves 13 (or 113) may be formed in a meandering shape, a zigzag shape or the like over the entire length of the outer wall portion 12 (or 112) in 1) in the longitudinal direction. Further, the foamable base material 30 can be fixed in the holding groove 13 (or 113) of the reinforcing body 11 (or 111) with an adhesive, but without using an adhesive, appropriate fixing means or locking means can be used. May be fixed. Further, a required number of granular foamable base materials may be arranged in the longitudinal direction of the holding groove 13 (or 113) of the reinforcing body 11 (or 111) and fixed with an adhesive or the like. Further, without providing the holding groove 13 (or 113) in the outer wall portion 12 (or 112) of the reinforcing body 11 (or 111), the foamable base material 30 (or 130) is formed in the longitudinal direction of the outer wall portion 12 (or 112). ) Can be fixed.

In the first and second embodiments,
In order to attach the reinforcing member 10 (or 110) to the hollow panel 1, the attachment clip 20 (or 120) as an attachment means is formed integrally with the reinforcing member 11 (or 111), but is not limited thereto. is not. For example, the reinforcing body 11
A mounting piece may be formed at a predetermined position in (or 111), and the reinforcing member 10 (or 110) may be mounted on the hollow panel 1 by screwing a screw through the mounting piece into the hollow panel 1. Further, the hollow structure may be a hollow structure constituting a building such as a building or a ship other than the hollow panel 1 such as a pillar, a rocker panel, and a roof panel of a vehicle body.

[0033]

As described above, according to the present invention,
Unlike the related art, it is possible to prevent a problem that the hollow structure is unexpectedly deformed due to a gap between the hollow structure and the reinforcing member, and it is possible to efficiently reinforce the hollow structure. In particular, the reinforcing effect on the torsional load of the hollow structure is large.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing a state in which a reinforcing body of a reinforcing tool used for a reinforcing structure of a hollow structure according to a first embodiment of the present invention and a foamable base material are separated.

FIG. 2 is a longitudinal sectional view showing a state in which a reinforcing member is mounted in a hollow chamber of the hollow panel.

FIG. 3 is a cross-sectional view showing a state in which a reinforcing member is mounted in a hollow chamber of the hollow panel.

FIG. 4 is a longitudinal sectional view showing a state in which the foamable base material of the reinforcing device has foamed into a foam.

FIG. 5 is a cross-sectional view showing a state in which the foamable base material of the reinforcing device is foamed to form a foam.

FIG. 6 is a cutaway perspective view showing a state in which a reinforcing body of a reinforcing tool used for a reinforcing structure of a hollow structure according to a second embodiment of the present invention and a foamable base material are separated.

FIG. 7 is a cross-sectional view showing a state in which a reinforcing member is attached to the hollow chamber of the hollow panel.

8 is a vertical sectional view based on the line VIII-VIII in FIG. 7;

FIG. 9 is a cross-sectional view showing a state in which the foamable base material of the reinforcing device has foamed into a foam.

FIG. 10 is a longitudinal sectional view based on the line XX of FIG. 9;

FIG. 11 is an explanatory view showing, in an enlarged manner, the relationship between the holding groove and the locking portion of the reinforcing member and the foamable base material.

FIG. 12 is an explanatory view showing a state where the foamable base material is foamed to form a foam.

FIG. 13 is an explanatory view showing an embodiment in which a holding groove of the reinforcing member is formed by a protruding piece.

FIG. 14 is an explanatory view showing an embodiment in which a holding groove of the reinforcing member is formed in a raised bottom shape by a protruding piece.

FIG. 15 is an explanatory view showing an embodiment in which a projection-like locking portion is formed in a holding groove of the reinforcing body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow panel (hollow structure) 6 Hollow chamber 10,110 Reinforcement tool 11,111 Reinforcement body 12,112 Outer wall part 13,113 Holding groove 30,130 Foamable base material 35,135 Foam body 118 Locking part

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) B29L 31:30 B29L 31:30

Claims (6)

[Claims] 1. A hollow body of a hollow structure is provided with a reinforcing body extending with a required length in a longitudinal direction thereof, and a foam is interposed between an inner wall surface of the hollow chamber and the reinforcing body. The reinforcing structure of a hollow structure in which the foam is present continuously over substantially the entire length of the reinforcing body in the longitudinal direction and integrally joins the hollow structure and the reinforcing body. 2. The reinforcing structure for a hollow structure according to claim 1, wherein the reinforcing member is provided with a locking portion for preventing movement of the foam in the longitudinal direction. Construction. 3. A reinforcing body extending with a required length in the longitudinal direction of the hollow chamber of the hollow structure, and a foam existing over substantially the entire length in the longitudinal direction of the reinforcing body due to external heating, and A reinforcing member for a hollow structure, comprising a foamable base material for integrally joining an inner wall surface of a chamber and the reinforcing member. 4. The reinforcing tool for a hollow structure according to claim 3, wherein a holding groove for holding the foamable base material is formed in an outer wall portion of the reinforcing body over substantially the entire length in the longitudinal direction. Of a hollow structure. 5. The reinforcing tool for a hollow structure according to claim 3, wherein the foam base material is formed into a foam on the groove wall surface of the holding groove formed on the outer wall of the reinforcing body. A reinforcing member for a hollow structure having a locking portion for preventing movement in a longitudinal direction. 6. The reinforcing member for a hollow structure according to claim 3, wherein the foamable base material is continuously formed over substantially the entire length in the longitudinal direction of the reinforcing member, and is formed by extrusion. Reinforcement for things.